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217db90e87
1**n => 1, -1**n => 1 (n: even) / -1 (n: odd). * test/ruby/test_fixnum.rb (TestFixnum::test_pow): update test suite. pow(-3, 2^64) gives NaN when pow(3, 2^64) gives Inf. git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_1_8@12808 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
26 lines
438 B
Ruby
26 lines
438 B
Ruby
require 'test/unit'
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class TestFixnum < Test::Unit::TestCase
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def setup
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@verbose = $VERBOSE
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$VERBOSE = nil
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end
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def teardown
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$VERBOSE = @verbose
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end
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def test_pow
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[1, 2, 2**64, 2**63*3, 2**64*3].each do |y|
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[-1, 0, 1].each do |x|
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z1 = x**y
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z2 = (-x)**y
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if y % 2 == 1
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assert_equal(z2, -z1)
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else
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assert_equal(z2, z1)
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end
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end
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end
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end
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end
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